A transport system and transport device guided via a plurality of rollers in a running direction along a running rail. The transport system has a curved running rail with first and second running surfaces at a first running rail side flank. First and second rollers form a first roller unit for the first running surface, and third and fourth rollers form a second roller unit for the second running surface. The first and/or second roller unit has a rocker unit with a rigid connection of the rotation axles of the first and second rollers of the first roller unit, and/or the rotation axles of the third and fourth rollers of the second roller unit, and a rocker axle. The rigid connection is pivotably supported about the rocker axle, arranged transversely to the running direction of the first and/or second roller unit, which has the rocker unit.